Furnace planning
Rust Smelting Calculator
Split an ore run across ovens and check the finish time, wood demand, and expected charcoal.
Patch 2026.07 · Updated 2026-07-11
Smelting run
Inputs
Run plan
Estimated output
- Elapsed time
- 0h 27m 47s
- Wood
- 167
- Expected charcoal
- 41
- Output
- 1,000
Assumes the ore is divided evenly across usable input slots.
Furnace guide
Cook time changes by ore
Compare base cook times and decide when extra ovens are worth the setup.
Quick answers
Frequently asked questions
Does the electric furnace use wood?
No. It has no fuel slot, so this calculator reports zero wood and charcoal.
Why is charcoal shown as an expected amount?
The byproduct uses a chance value, so a single run can land above or below the estimate.